Hugh,
Schott Glass provides a multitude of glass types that one would primarily use in a refractor or eyepiece type project...or perhaps a mirror flat...
Very Good company, but what are you looking for in glass???
Preston
Schott Glass provides a multitude of glass types that one would primarily use in a refractor or eyepiece type project...or perhaps a mirror flat...
Very Good company, but what are you looking for in glass???
Preston
